I used to think the one downtown was the only one in the country, but upon reading a bit it seems like they do exist in other locations and aren't uncommon on the West Coast. Of course people from Minnesota outside of Minneapolis often aren't aware they exist at all.

It's rather inconvenient with a shopping cart, but I've been to a few.

They don't have the cool shopping cart escalators?

The one outside New Orleans did (I presume still does.) It's still an awkward thing when you have a lot of goodies in the cart. Or maybe I'm just not used to it. No two storey Targets in Memphis as land is quite cheap and readily available here.